These hard plasticy/nylon bacon scented toys are always a hit in my house. I have two medium size dogs and they both love these. They carry them around, chew on them, bury them in the yard, dig them back up. Because of the material they are made from, they are super tough and never seem to wear down too much. My dogs aren't the most intense chewers but they do make a dent in these after awhile. I think when they chew the nylon its supposed to help "brush" their teeth like a natural bone. Idk they have super white teeth though. This came in a set of three. The size on these wasn't huge, great for my dogs (about 50 lbs each).